ok, I did it

[float('inf')]

ok, I'll do it

It should generally be understood by site practitioners that the description should be universal (language agnostic) and as such when looking at data the type used is not critical, so long as the specs are clear for the user to comprehend and procede coding in the language of their choice.

Otherwise it becomes very messy in terms of maintaining the description as new languages are added.

C Translation

you shouldn't post code like that; anyone can see it.

I added the spoiler flag to your comment

What would the expected return value be if the input was null?

The site doesn't run code like that.

Your code has a different flaw you have not yet detected.

retired

meanwhile, I just added a comment to the solution set-up that mentions allocation / freeing

I just ran the current version of your solution and it passed all tests.

?

The error message points out that you are trying to get a .name from undefined.

When you do a - 1 when the value of a is 0, you get a negative index which itself then produces a result of undefined.

please do not comment on code whereby you reveal solution methods

I have added the spoier tag to your comment

@bad pangolin

The correct result for this test is 18.

Note: it is a subarray of length 1.